Hg2(OH)2 = Mercury(I) hydroxide [Hg2(OH) is not possible, because OH is -1 charge] SnO2 = Tin (IV) oxide H2SO3 = Sulfurous acid HClO3 = Chloric Acid Solution Hg2(OH)2 = Mercury(I) hydroxide [Hg2(OH) is not possible, because OH is -1 charge] SnO2 = Tin (IV) oxide H2SO3 = Sulfurous acid HClO3 = Chloric Acid.